JPH06263196A - Oil feeding device - Google Patents

Abstract

PURPOSE:To provide an oil feeding device which detects the trace quantity of gasoline mixed in a kerosene or light oil storing tank. CONSTITUTION:The oil feeding device is provided with a float chamber in a gas-liquid separating means 3 connected to a fuel pump and a switching means 16 adapted for selective feeding of vapor from the vapor suction opening of an oil feeding nozzle into a gas sensor 30, whereby gas in the gas-liquid separating means is sent to a gas sensor 30 at the time of oil feeding to measure the concentration of vapor in an oil storage tank.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device having a function of detecting a vapor in an automobile fuel tank and automatically determining an oil type.

[0002]

2. Description of the Related Art An oil supply system is constructed so that fuel oil is assembled from an oil storage tank buried underground by an oil supply pump, and the fuel oil is measured and discharged to a vehicle fuel tank. There are two types of automobile engines, one that uses light oil as fuel and the other that uses gasoline as fuel. If different fuels are used, the engine will be damaged, so vapor is drawn from the automobile fuel tank before refueling. Therefore, there has been proposed an oil supply device having an oil type determination function that determines the fuel oil and enables the oil supply only when they match. By the way, even if the type of fuel oil suitable for the vehicle is determined to enable refueling by using such a function, fuel oil of a different oil type is fed to the oil storage tank connected to the refueling device. As a result, the fuel oil of a different oil type will be supplied to the vehicle. In order to solve such problems, the consistency of the oil type is strictly controlled when the fuel oil is supplied to the underground tank by Lorry, but the fuel oil of different oil type is mixed in the underground tank due to a mistake. I may end up doing it.
And once fuel oil of different oil type is injected into the underground tank, there is a problem that it takes time to notice this.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is, in particular, when volatile oil such as gasoline is mixed in a gas oil or kerosene storage tank. An object of the present invention is to provide a novel oil supply device capable of surely detecting this.

[0004]

In order to solve such a problem, in the present invention, a pump for sending fuel oil from an oil storage tank to a fueling nozzle via a gas-liquid separating means, and a fuel from the pump. A fuel supply nozzle having a main valve that controls the discharge of oil and a vapor intake / exhaust port that sucks vapor in the vehicle fuel tank, and an oil type determination unit that determines the type of oil in the vehicle fuel tank based on the vapor. The provided oil supply device is provided with a means for supplying the gas from the vapor intake / exhaust port immediately before starting the oil supply and from the gas-liquid separation means during the oil supply to the oil type determination means.

[0005]

[Function] Before starting refueling, remove the vapor from the automobile fuel tank,
After the start of refueling, the vapor from the gas-liquid separation means is sent to the oil type determination means to monitor the vapor concentration. Even if a small amount of gasoline is mixed in the gas oil or kerosene storage tank, the gas-liquid separation means produces a higher concentration of paper than in the case of using only kerosene or gas oil. It can detect that it is mixed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the illustrated embodiments. FIG. 1 shows an embodiment of the present invention by a flow path configuration, in which reference numeral 1 is an oil supply pump driven by a pump motor 2 and connected to a flow meter 4 via a gas-liquid separating means 3. Has been done. The discharge port of the flowmeter 4 is connected to the oil supply nozzle by the flow path 6. The flowmeter 4 is provided with a flow rate pulse transmitter 8 so that the amount of oil supply can be converted into a flow rate pulse and a flow rate signal can be output to a control device 9 described later. Reference numeral 9 denotes the above-described control device, which receives signals from the flow rate pulse transmitter 8, the nozzle switch 10, and a gas sensor 30 described later, and further includes a pump motor 2, a display 12, an alarm 13, an air pump 15 described later, and a stop valve 16. Is configured to output a control signal.

Reference numeral 15 is the above-mentioned air pump, the suction port of which is connected to the float chamber 3a of the gas-liquid separating means 3 through the switching valve 16.
Is connected to the atmosphere opening port 7, and the discharge port is connected to the air inlet port 47 of the ejector 40 of the oil supply nozzle 20 described later. Reference numeral 20 denotes a vapor suction mechanism and gas detection means. As shown in FIGS. 2 and 3, the refueling nozzle 21 is provided with a main valve 26 that is opened and closed by a refueling lever 25 and a body portion 27, and is connected to the pipeline 6. Further, the fuel oil from the hose 28 is provided on the body portion 27 of the fuel supply nozzle 21 configured to be discharged from the nozzle cylinder tip portion 29.

In this embodiment, the gas sensor 30 is a gas sensor chamber 35 formed of a cylindrical body having a constant propagation path length because the vapor concentration is measured based on the propagation velocity of ultrasonic waves.
And an ultrasonic transducer 37 is housed therein. A first opening 43 connected to the negative pressure port 41 of the ejector 40 by a tube 42 is provided at one end of the gas sensor chamber 35,
A second opening 46 connected to the vapor suction / scavenging port 45 of the nozzle cylinder tip portion 29 by a tube 44 is formed at the other end. The switching valve 31 has a spring 50 at the tip of the refueling lever 25.
The lever 51 urged by the valve and the diaphragm 54 which receives the hydraulic pressure of the main valve chamber 53 by the flow path 52 and moves, and at the same time, an operating rod 56 which is normally urged by the spring 55 to one side. I have it. The operating rod 56 is provided with a valve body 57, and when it is located on the right side in the figure, the communication between the exhaust port 60 of the ejector 40 and the atmosphere opening port 62 is cut off, and the air from the air tube 63 is detected by the gas sensor. In a state where the gas is supplied to the chamber 35 and is located on the left side in the drawing, the exhaust port 60 of the ejector 40 and the atmosphere opening port 62 are connected to each other so that the negative pressure generated in the ejector 40 acts on the gas sensor chamber 35. ing.

Reference numeral 32 is a lever switch for actuating the gas sensor 30 when the refueling lever 25 is pulled up, which is a micro switch in this embodiment.
When the refueling lever 25 is pulled up and the magnetic body 53 at the tip of the lever 51 faces, the sensor drive pulse from the control device 9 is supplied to the gas sensor 30, and the echo signal resulting from this drive pulse is output to the control device 9. It is a thing.
The transmission of these signals is performed by the cable 64 inserted through the air tube 63. This air tube 6
3 is extended by being attached to a hose 28 that connects the refueling nozzle 21 and the body of the refueling device. Incidentally, reference numeral 65 in the drawing
Indicates a conduit connecting the vapor suction / scavenging port 45 and the gas sensor chamber 35.

Next, the operation of the apparatus configured as described above will be described based on the flow chart shown in FIG. 4 by taking an example of an oil supply apparatus for supplying light oil. Refueling nozzle 2 to refuel
When 1 is picked up and the nozzle switch 10 is turned ON (step B in FIG. 4), the display 12 is reset to zero and the air pump 15 starts operating (step B in FIG. 4). In this state, when the nozzle barrel tip 29 is inserted into the vehicle fuel tank and the refueling lever 25 is pulled up, the magnetic body 53 at the tip of the lever 25 faces the nozzle lever switch 32, and at the same time the operating rod 56 is pushed to the left in the drawing. Get caught As a result, the lever switch 32 is turned on (step C in FIG. 4), and the switching valve 31 moves from the position a to the position b, and the ejector 4 is moved.
The exhaust port 60 of 0 is opened to the atmosphere. As a result, a negative pressure is generated from the ejector 40, and the vapor of the automobile fuel tank flows into the sensor chamber 35 of the gas sensor 30 from the vapor intake / exhaust port 45 of the nozzle barrel tip 29.

When the nozzle lever switch 32 is turned on, the controller 9 causes the transducer 37 of the sensor 30 to be turned on.
A driving pulse is supplied to and the concentration of vapor is measured based on the transfer time. Although the gas sensor is constituted by the ultrasonic transducer in this embodiment, it is obvious that the same can be measured by using a means for measuring the concentration of hydrocarbons, for example, a semiconductor gas sensor.

In this way, the predetermined time T ₁ , for example, 0.
When the output from the sensor 30 does not reach the vapor concentration of gasoline even after 5 seconds has elapsed (step 4 in FIG. 4) and the vapor in the vehicle fuel tank has sufficiently flowed into the sensor chamber 35 (step 4 in FIG. 4), Since the oil type of the automobile fuel tank is light oil, it is determined that the oil types are the same, the pump motor 2 is turned on, and the switching valve 16 is switched from the atmosphere opening port 7 to the float chamber 3a (step 4 in FIG. 4).
E). As a result, the light oil from the oil supply pump 1 flows into the vehicle fuel tank, and the light oil is supplied.

At the same time, since the suction port of the air pump 15 is connected to the float chamber 3a of the gas-liquid separating means 3, the vapor of the float chamber 3a is sucked by the air pump 15 and flows into the ejector 40. In the refueling state (Fig. 4 step
F) Since the switching valve 31 is switched from the position b to the position a by the diaphragm 54 which receives the hydraulic pressure of the main valve chamber 53, the air in the float chamber 3a is supplied to the negative pressure supply port 41 of the ejector 40.
Flow into the gas sensor 30 via the air tube 6
5 is discharged to the atmosphere from the vapor intake port 45 of the refueling nozzle 21. As a result, the gas sensor 30 receives the inflow of vapor that matches the type of oil in the oil storage tank.
Then, in this state, when the output from the sensor 30 does not match the vapor of gasoline (step 4 in FIG. 4), the pump motor 2 is continuously driven.

When a predetermined amount of oil has been supplied and the main valve 26 is closed by the oil supply lever 25, the oil supply nozzle 21 is returned to the nozzle hook, and the nozzle switch 10 is turned off (see FIG. 4).
In step f), the control device 9 turns off the pump motor 2 and switches the switching valve 16 to the atmosphere opening port 7 side (step in FIG. 4). As a result, fresh air is supplied from the air pump 15 to the gas sensor 30, and the vapor in the air tube 63 and the gas sensor chamber 35 can be scavenged. When a predetermined time T ₂ has passed in this state (see FIG.
Then, the air pump 15 is stopped and the scavenging is completed (step 4 in FIG. 4).

On the other hand, once refueling is started, the switching valve 16 is switched to the float chamber 3a side (step 4 in FIG. 4).
E) If the output from the gas sensor 30 matches the vapor concentration of gasoline with the vapor in the float chamber 3a flowing into the gas sensor 30 (step 4 in FIG. 4), it is determined that gasoline is mixed in the oil storage tank. The pump motor 2 is turned off to forcibly stop refueling, and the switching valve 16 is operated to operate the air tube 63 and the gas sensor 3.
0 is scavenged, and a refueling disabling process that disables the subsequent refueling operation is performed (step 4 in FIG. 4). Next, the alarm 13 informs that the oil storage tank is filled with gasoline to call attention (step 4 in FIG. 4). Based on this notification, when the nozzle is returned to the nozzle hook and the nozzle switch 10 is turned off (step 4 in FIG. 4), the notification is stopped (step 4 in FIG. 4). And the predetermined time T
_{When 2} has passed (step 4 in FIG. 4), turn off the air pump 15.

On the other hand, the nozzle tube tip portion 29 is inserted into the vehicle fuel tank and the refueling lever 25 is pulled up to move the nozzle tube tip portion 2
The vapor of the vehicle fuel tank flows into the sensor chamber 35 of the gas sensor 30 through the vapor intake / exhaust port 45 of 9 and before the vapor of the vehicle fuel tank elapses for a predetermined time T ₁ , for example, 0.5 seconds (step D in FIG. 4). When the vapor concentration of gasoline is reached (step 4 in FIG. 4), the alarm 13 notifies that the oil type is different without driving the pump motor 2 (step 4 in FIG. 4). Based on this notification, when the nozzle is returned to the nozzle hook and the nozzle switch 10 is turned off (step 4 in FIG. 4), the notification is stopped (step 4 in FIG. 4), and the predetermined time T
_{When 2} has passed (step 4 in FIG. 4), the air pump 15 is turned off to end the scavenging (step 4 in FIG. 4).
Re).

In the above-described embodiment, an example has been described in which the gas sensor and the negative pressure generating means are provided in the oil supply nozzle, but the gas sensor and the negative pressure generating means are provided in the main body of the oil supply device. The same can be applied to the other case. That is, in FIG. 5, reference numeral 30 in the drawing is the above-mentioned gas sensor, and the discharge port of the air pump 15 and the negative pressure supply port of the negative pressure generating means 40 such as an ejector are connected to one end via the _first switching valve V _1. Further, a vapor conduit 76 and a conduit 77 connecting to the gas-liquid separation chamber 3 are connected to the other end via the second switching valve V ₂ . The vapor conduit 76 is extended to the refueling nozzle via the air tube 63 led out from the refueling device main body, and the vapor intake / exhaust port of the nozzle cylinder tip is provided via the stop valve 80 interlocking with the main valve 26 operated by the refueling lever. It communicates with 45. A pressure sensor 78 is connected to the vapor conduit 76 so as to detect the time point at which refueling is started based on the change in pressure in the vapor conduit 76.

Next, the operation of the apparatus configured as described above will be described with reference to FIG.
It will be described based on the flowchart shown in FIG. To refuel, the refueling nozzle is picked up and the nozzle switch 10 is turned on.
When it becomes (step a in FIG. 6), the display 12 returns to zero and the air pump 15 starts operating (step b in FIG. 6). The ejector 40 receives supply of air from the air pump 15 and generates a strong negative pressure. This negative pressure is the switching valve V
₁ , V ₂ to the vapor conduit 76. In this case, before the refueling, the stop valve 8 provided in the refueling nozzle
0 is closed, and a strong negative pressure is generated in the vapor conduit 76. In this state, when the nozzle is inserted into the vehicle fuel tank and the refueling lever is pulled up, the stop valve 80 interlocks with the refueling lever.
Is opened, the vapor in the automobile fuel tank flows into the air tube 63 and the vapor conduit 76 from the vapor intake / exhaust port, and the pressure rises (step C in FIG. 6). This vapor further flows into the gas sensor 30 via the switching valve V ₂ .

In this way, a predetermined time T3, for example, 0.5 seconds has elapsed since the pressure increase was detected by the pressure sensor 78 (step D in FIG. 6), and the vapor of the vehicle fuel tank sufficiently flowed into the gas sensor 30. Even when the output from the gas sensor 30 does not reach the vapor concentration of gasoline even at this time (step 6 in FIG. 6), it is determined that the oil types in the vehicle fuel tank are light oil, and it is determined that the oil types match, and the pump motor 2 is turned on. And the switching valve V ₂ is switched to the gas-liquid separation chamber 3 side (step E in FIG. 6). As a result, the light oil from the oil supply pump 1 flows into the fuel tank of the vehicle and the light oil is supplied (step F in FIG. 6).
In this state, the gas sensor 3 is switched by switching the switching valve V _2.
0 and the air conduit 76 are disconnected, and instead the conduit 77
Since it is connected to the gas-liquid separation means 3 through the ejector 40, the vapor in the float chamber of the gas-liquid separation means 3 is sucked by the gas sensor 30 by the ejector 40. As a result, the gas sensor 70 receives the inflow of vapor that matches the type of oil in the oil storage tank. In this state, when the output from the gas sensor 30 does not match the vapor of gasoline (step in FIG. 6), the drive of the pump motor 2 is continued.

When a predetermined amount of oil has been supplied and the oil supply nozzle is returned to the nozzle hook and the nozzle switch 10 is turned off (step F in FIG. 6), the pump motor 2 is turned off and the switching valves V ₁ and V ₂ are switched. (Fig. 6 step).
As a result, the ejector 40 and the gas sensor 30 are disconnected from each other, and instead are connected to the discharge port of the air pump 15,
Further, the other end of the gas sensor 30 is disconnected from the gas-liquid separating means 3 and is instead connected to the vapor conduit 76. As a result, the fresh air from the air pump 15 is transferred to the gas sensor 30.
Through the check valve 81, and is discharged to the atmosphere from the vapor intake / exhaust port 45 of the refueling nozzle, and scavenges the vapor remaining in the gas sensor 30 and the vapor conduit 76.

When a predetermined time T4 has elapsed from the start of scavenging (step 6 in FIG. 6), the controller 9 causes the air pump 1 to
5 is stopped to terminate the scavenging, and the switching valve V ₁ is switched to connect the gas sensor 30 and the ejector 40 to prepare for the next refueling (step 6 in FIG. 6).

On the other hand, the pump motor 2 is driven and the switching valve V ₂ is switched to the gas-liquid separating means 3 side (see FIG. 6).
Step E), when the vapor of the gas-liquid separation means 3 flows into the gas sensor 30, the output from the gas sensor 30 matches the vapor concentration of gasoline (FIG. 6 step).
A) It is determined that gasoline is mixed in the oil storage tank, the pump motor 2 is turned off to forcibly stop the refueling, and the switching valve V ₂ is switched to connect the gas sensor 30 and the vapor conduit 76, Further, a refueling disabling process is performed to make subsequent refueling operations impossible (step 6 in FIG. 6).
Next, the switching valve V ₁ is switched to connect the gas sensor 30 and the air pump 15, and the gas sensor 30 and the vapor conduit 7 are connected.
The scavenging of No. 6 is performed, and the alarm 13 notifies that the gasoline is mixed in the oil storage tank (FIG. 6 step).
Wa).

When the nozzle is returned to the nozzle hook and the nozzle switch 10 is turned off based on this notification (step C in FIG. 6), the notification is stopped (step in FIG. 6).
Yo). When the predetermined time T4 has passed (step 6 in FIG. 6), the air pump 15 is turned off to end the scavenging, and the switching valve V ₁ is switched to switch the gas sensor 30.
Is connected to the ejector 40 (step 6 in FIG. 6).

On the other hand, the nozzle barrel tip portion 2 is inserted into the automobile fuel tank, and the refueling lever 25 is pulled up to move the nozzle barrel tip portion 2
The vapor of the automobile fuel tank flows into the gas sensor 30 from the vapor intake / exhaust port 45 of 9 and the vapor of the automobile fuel tank reaches the vapor concentration of gasoline until a predetermined time T3, for example, 0.5 seconds elapses (step d in FIG. 6). When it reaches (step S in FIG. 6), the switching valve V ₁ is switched without driving the pump motor 2 to supply fresh air from the air pump 15 to the gas sensor 30 to perform scavenging, and the alarm 13 To inform you that the oil type is different, and be careful (Fig. 6 Step W). Based on this notification, when the nozzle is returned to the nozzle hook and the nozzle switch 10 is turned off (step 6 in FIG. 6), the notification is stopped (step 6 in FIG. 6), and when a predetermined time T4 has elapsed (FIG. 6). Step), air pump 15
Is turned off to end the scavenging (Fig. 6 step).

[0025]

As described above, in the present invention,
A pump for feeding the fuel oil in the oil storage tank to the refueling nozzle through the gas-liquid separating means, a main valve for controlling the discharge of the fuel oil from the pump, and a vapor intake / exhaust port for sucking the vapor in the automobile fuel tank. In a refueling device comprising a refueling nozzle provided and an oil type determining means for determining the oil type of the vehicle fuel tank based on the vapor, immediately before starting refueling, from the vapor intake / exhaust port, and during refueling, gas-liquid Since a means for supplying the gas from the separation means to the oil type determination means is provided, it is possible to reliably detect the inclusion of a slight amount of gasoline or other volatile oil in the oil or kerosene storage tank without the need for special equipment. be able to.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an apparatus showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an example of an oil supply nozzle used in the same apparatus.

FIG. 3 is a cross-sectional view showing an upper surface structure of the oil supply nozzle shown in FIG.

FIG. 4 is a flowchart showing the operation of the above apparatus.

FIG. 5 is a configuration diagram of an apparatus showing a second embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the second embodiment.

[Explanation of symbols]

 1 Oil Refueling Pump 2 Pump Motor 3 Gas-Liquid Separation Means 10 Nozzle Switch 15 Air Pump 26 Main Valve 30 Gas Sensor 35 Sensor Room 40 Ejector

Claims (1)

[Claims] 1. A pump for feeding fuel oil from an oil storage tank to a fueling nozzle through a gas-liquid separating means, a main valve for controlling discharge of fuel oil from the pump, and a vapor in an automobile fuel tank. In a refueling device comprising a refueling nozzle having a vapor intake / exhaust port, and an oil type determining means for determining an oil type of the vehicle fuel tank based on the vapor,
A refueling device comprising means for supplying gas from the vapor suction / exhaust port immediately before starting refueling and from the gas-liquid separating means to the oil type determining means during refueling.